Precision Billet Turbo discussion

That is nasty turbo on its own.

can be pushed beyond rated easily and you can see past 680whp

No experience w/ Precision turbos but you can sell me your old setup when you buy the new one :-)

No experience either but depending on the application a 6262 would seem to be heaps big enough, 5857 should give great response and still deliver the power you want. Let us know, interested in the outcome.

With my 5857 billet .82 ar turbine I was seeing 23psi at 3800 rpm through the 3" dump. Based on the cars I raced, I was making ~450 whp and 500+ wtq on pump gas. Oh and on 100% stock internals. Boost comes on hard, brake boosting in second would result in instant wheelspin upon release of the brakes.

23psi at 3800rpm :lol: thats with an open exhaust by the sound of it. What revs would it pull hard too?

No experience with precision turbos either, but I do have a billet compressor wheel sitting on my desk at work…

It would pull hard till about 5800. The stock cams hold it back after that. I would normally shift between 5500 and 6200.

I'm thinking of a set of 'SATAN spec' 280/280 .50" lift Isky cams, VG33, sound good? Hope I'm not taking this thread off topic, looks like the 5857 may be a viable alternative to the 6262 though.

I have that exact turbo on my VG currently. Its fantastic. Bump up your gain on your EBC and you'll literally watch the boost rocket to 20lbs in 1 second. My tune is still very conservative and my weak clutch and the car is around 425 RWHP @ 20 lbs. A good friend of mine locally just tuned an SR20 with a 6262 to 475 rwhp and 365 rwtq @ 20 lbs. He also tuned an Evo on the same turbo to 702 AWHP @ 40 lbs.

At 18 lbs, with proper head work and the right cams, I'm confident you could make 450 RWHP. This is a 500 RWHP capable turbo on pump gas. 700+ on race gas.

[quote]260DET wrote: To anyone else thinking of running cams that big… don't do it. It is not needed and it is too much of a pain to get them to work right. You can get great results with smaller cams. And its 288/288 and .545" lift. TOO BIG… NOT NEEDED. That and it puts my power band higher than the vg wants to rev anyways.

5857 seems kind of small to me. I would rather have turbo for over 600hp but just put down 450whp. Currently my holset gets FULL 17lbs of boost before 4000rpms. I would like to keep it that way however pick up some more power on the same boost level. Im thinking a precision 6262 with a .82 A/R turbine and a V-band flange outlet will be a good choice. 6765 is just too big Im sure.

I AM selling my ENTIRE setup. Check the for sale section. Everything bolt on for a 400rwhp holset setup. On 17lbs the other day, my car was 12 second material at the track. The holset is a good turbo dont get me wrong. Im just looking to push the hell out of the stock internals with a bigger turbo and E85. Im looking for 450rwhp+ on a stock rebuilt bottom end, using E85 and under 20lbs of boost.

If you want a big turbo and quick spool up,get a Turbonetics twin scroll turbine housing and a QSV.

Any photos of the setup? Mounted in stock location?

I hear what you are saying, but in all reality the pt5857 is larger than the gt35r.

35r on the left.




300zxt, the precision turbos use the same housings from pt5557 all the way up to the pt6765. The main difference being the inner portion where the compressor is. Here is a pt5857 in the stock location.